Even when launching Marp.app, no new window appears.
- Marp 0.0.11 (0.0.11)
- macOS 10.12.6 (Sierra) and 10.13 (High Sierra)
See ~/Library/Application\ Support/Marp/config.json (attached as config.json).
In my config, I could see windowPosition.x = -2560, windowPosition.y = -390.
Set windowPosition.x to 0 and windowPosition.y = 0.
FYI yhatt/marp#47